1640s, "violently shaken;" 1840, "scandalized," past-participle adjective from shock (v.1).
Entries linking to shocked
shock v.1
"to come into violent contact; strike against suddenly and violently," 1560s, literal senses now archaic or obsolete, from shock (n.1). The meaning "offend, displease, strike with indignation, horror, or disgust" is by 1650s. The meaning "to give (something) an electric shock" is from 1746.